Tim Demko
@timdemko.xyz
2.7K followers 4.6K following 660 posts
Geologist interested in the energy transition, bicycling, and public service https://bio.link/timdemko https://orcid.org/0000-0002-9125-0907 https://www.semanticscholar.org/author/Timothy-Michael-Demko/15743754
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Reposted by Tim Demko
wearetektonika.bsky.social
🆕 🔔 New paper: "Lateral Evolution of the Deep Crustal Structure of the Lesser Antilles Subduction Zone from Wide-Angle Seismic Modeling" by Frauke Klingelhoefer et al.
⚒️
tektonika.online/index.php/ho...
Screenshot showing the title and authors list of the paper Screenshot showing the abstract of the paper
Reposted by Tim Demko
journalsysevo.bsky.social
Running a bit late, so it's #FossilFriday on a Monday––and is it ever a good one!

Feng et al. report the first #fossil record of Cheliferidae (Pseudoscorpion #arachnids) from mid-#Cretaceous Kachin #amber! #BugSky

Learn more about these fascinating creatures right here!

🦂 doi.org/10.1111/jse....
The first Cheliferidae (Pseudoscorpiones: Cheliferoidea) from mid‐Cretaceous Kachin amber
This study presents the first fossil record of Cheliferidae from mid-Cretaceous Kachin amber, specifically a well preserved male specimen (Echinochelifer curvatus gen. et sp. nov.) from amber mines n....
doi.org
Reposted by Tim Demko
ferwen.bsky.social
Quantitative assessment of community structure of fossil forests from the Devonian to Jurassic periods 🧪⚒️ 🌴
www.sciencedirect.com/science/arti...
Reposted by Tim Demko
natgeosci.nature.com
⚒️ Comment: The timing is right for an orbital gravity mission to test competing formation hypotheses for the Martian global topographic dichotomy

@jtuttlekeane.bsky.social

www.nature.com/articles/s41...
Client Challenge
www.nature.com
Reposted by Tim Demko
natgeosci.nature.com
⚒️ Article: Stabilization of continental crust requires temperatures of over 900°C, establishing a link between ultrahigh-temperature metamorphism and craton formation

www.nature.com/articles/s41...
Schematic illustration of ultra-high temperature differentiation of continental crust
Reposted by Tim Demko
seismosocam.bsky.social
🌟OPEN ACCESS🌟 Peak Ground Velocity and Shaking Duration Control Coseismic Surficial Sediment Remobilization on Lacustrine Slopes and Emplacement of Seismoturbidites #SRL

Linking lake deposits with instrumentally recorded earthquakes calibrates paleoquakes.

pubs.geoscienceworld.org/ssa/srl/arti...
Reposted by Tim Demko
arminreindl.bsky.social
For Day 13 of #Croctober I just wanna give a quick shout out to Mambawakale from the Mid Triassic Manda Beds of Tanzania. It was originally placed in a polytomy at the base of Paracrocodylomorpha, but was recently recovered as an early poposauroid
Illustration by Gabriel Ugueto
An illustration of Mambawakale scaled to a silhouette of Steve Irwin. The animal is about as long as a large modern crocodile, but with noticably less  armor, a deeper torso, a rectangular skull and much longer legs, resembling a generalized "rauisuchian"
Reposted by Tim Demko
geophotographer.org
Scientists applied an AI model to seismic data from Italy’s Campi Flegrei between 2022 and 2025, detecting over 54k small earthquakes. Results map a shallow ring fault system beneath the caldera and show no indication of new magma movement.
🧪⚒️🌋
#AI
#Seismology

Paper
www.science.org/doi/10.1126/...
AI model reveals hidden earthquake swarms and faults in Italy’s Campi Flegrei
A new AI model detects thousands of previously unseen earthquakes in near real time, helping scientists understand changes in an Italian volcanic area where earthquakes have been intensifying since 20...
sustainability.stanford.edu
timdemko.xyz
Four "excellents", one "good"
Reposted by Tim Demko
obialik.bsky.social
And she knows, because she warns him, and her instincts never fail, that the female of her species lives on longer than the male. 🧪

(Yes, I couldn't resist the temptation of borrowing from Julia Ecklar's The Female of the Species)

Link: www.science.org/doi/10.1126/...
Sex differences in ALE (Adult Life Expectancy) for taxonomic orders and families.
(A) Mean (white dots) order-level ALE differences, where horizontal bars show the 95% confidence intervals calculated from the weighted SEs across nine mammalian and 15 bird orders. Only orders with more than five species (gray points) were included. (B) ALE differences for 100 primate species. Red and blue bars show the 95% credible intervals, while the white dots show the posterior mean ALE difference. Color represents whether the mean ALE difference favored females (red) or males (blue). Opacity indicates the strength of evidence for those differences (zero overlap of ≤0.05). The tiles indicate whether the species is monogamous (yellow) or not (purple). Animal shapes were obtained from phylopic.org. (C) Posterior distribution of ALE differences for different populations of humans, chimpanzees, and gorillas, including the chimpanzee populations from the Taï National Park (Côte d’Ivoire), the Gombe National Park (Tanzania), and the Budongo Forest (Uganda) and the gorilla population from Mbeli Bai (Republic of Congo). The shaded areas under the curves show the 95% credible intervals.
Reposted by Tim Demko
andrejpaleo.bsky.social
Cool to discover the new living fossils. One example is Hula painted frog www.nature.com/articles/nco... , which is endemic to one lake in Israel and it diverge from sister in the Paleogene.
Apparently a new (extinct) species is found in Pleistocene of Italy. www.tandfonline.com/doi/full/10....
🧪 ⚒️
Molecular phylogeny of recent Alytidae and Bombinatoridae. Lateral and ventral view of a female L. nigriventer. Artistic reconstruction of Latonia dimenticata.
Reposted by Tim Demko
melaniebergma18.bsky.social
🪸Our new study on long-term changes in megafauna from the #Arctic #DeepSea finds faunal density & species richness increased & then decreased over the 20 years period. Community structure made a partial return to the 2002 state in 2022, suggesting cyclicality. @awi.de
www.int-res.com/abstracts/me...
Reposted by Tim Demko
ljelkins.bsky.social
This is bizarre. What do folks think research is? Exploring a new idea, by reading ~100 articles in chronological order and discovering the holes in their reasoning, is actually really fun IF you like the subject and doing research. (And if you don't, that's ok, it's just not your career path.)
arrianna-planey.bsky.social
People who say "you can't possibly read everything you cite" are saying a lot about themselves, IMO.

It doesn't have to be a heavy lift. I spend about half an hour a day processing new-to-me papers by organizing them in my reference managers & adding topical tags so I can create bibliographies.
Reposted by Tim Demko
eageo.bsky.social
Job alert: x2 DAAD-funded #PhD scholarships in Experimental Geosciences for international candidates, University of Bayreuth (DE). Apply by 20 Dec. More info: buff.ly/YSpsyZO
Reposted by Tim Demko
seismosocam.bsky.social
In a new #SRL paper, a team used satellite data to explore coseismic deformation of three earthquakes spanning 2016 to 2025 in southern Tibet, including the magnitude 7.1 Dingri earthquake. ⚒️

pubs.geoscienceworld.org/ssa/srl/arti...
Reposted by Tim Demko
efgeologists.bsky.social
🌍 Geosciences are vital for Europe’s competitiveness, security & autonomy, securing resources, clean tech & defense. Without a strong geoscience capacity, Europe risks dependence and loss of sovereignty. Read the 2 new policy papers by EFG, INTRAW & EuroGeoSurveys: eurogeologists.eu/geosciences-...
Reposted by Tim Demko
dahlgeoed.bsky.social
The Geology Dept at WWU is hiring an Assistant Prof in Hydrology! Come be my colleague in a great department! More info in the attached flyer, and at hr.wwu.edu/careers-facu...
Assistant Professor of Hydrogeology

About Western: Western Washington University, with over 15,000 students in seven colleges and the graduate school, is nationally recognized for its educational programs, students and faculty. The campus is located in Bellingham, Washington, a coastal community of 90,000 overlooking Bellingham Bay, the San Juan Islands and the North Cascades Mountain range. The city lies 90 miles north of Seattle and 60 miles south of Vancouver, British Columbia. Western has additional sites in Anacortes, Bremerton, Everett, Port Angeles, and Poulsbo. Western is recognized nationally for its successes, such as being named one of the top public master's-granting institutions in the Pacific Northwest for 25 years in a row by U.S. News & World Report.

About the Geology Department: The Geology Department has 17 faculty, offering BA, BS and MS programs in Geology, Geophysics, and Science Education, serving approximately 190 majors. The department has strengths in field and lab-based teaching and research in geomorphology, igneous petrology, geophysics, hydrogeology and envionmental/engineering geology, planetary geology, sedimentology, science education, and structure/tectonics.

Additional information about our programs can be found at https://geology.wwu.edu/. The Geology Department strives to further Western's identity as an institution that welcomes and embraces diversity and encourages applications from diverse candidates.

About the Position: The ideal candidate will support our department's ability to produce workforce-ready geoscientists. We seek individuals who are enthusiastic about teaching and who will establish a productive research program that involves undergraduate and Master's-level students. Broad areas of research interest may include, but | are not limited to, groundwater-surface water interactions, environmental hydrogeology, and groundwater systems (e.g-geothermal, fault zone, coastal, mountain). Teaching responsibilities will in…
Reposted by Tim Demko
daveyfwright.bsky.social
Absolutely jaw dropping, spectacularly preserved & beautiful fossil crinoid (left) and blastozoan (right) echinoderms. These fossils are from the Bromide Fm of Oklahoma and nearly all specimens shown here are from the type collection at the Sam Noble Oklahoma Museum of Natural History 🧪
Reposted by Tim Demko
seismosocam.bsky.social
In a new #SRL paper, a team of scientists uses Coulomb stress transfer modeling and InSAR data to explore the destructive magnitude 7.1 Tingri earthquake in Xizang, China. ⚒️

pubs.geoscienceworld.org/ssa/srl/arti...
Reposted by Tim Demko
stevebrusatte.bsky.social
Walking in the footsteps of…giant Carboniferous trees?

Some 325 million years ago these coal swamp trees were so heavy they made ‘tree prints’ in the soft coral-infused limestone under the soil.

And today we saw them on our University of Edinburgh undergrad trip to Barns Ness!